Lithium in late-type giants. III. The weak G band giants.
Abstract
Li abundances are presented for nine different stars to demonstrate that the abundances are consistent with the cosmic value. The observations were made with the coude telescope and echelle spectrometer on La Silla, covering the Li I 6707 A resonance doublet and the 800 A 2-0 band. The survey included the HD stars 18636, 31274, 36552, 40402, 78146 and 82595 and the HR stars 1299 and 4154, all Southern Hemisphere weak Fraunhofer G band objects. Both Li-6 and Li-7 were detected in HR 1299. It is suggested that the Li detected in all the stars convected outward quickly and survived, while C diffused inward and was converted to C-13 and N-14. The Li abundances can be observed in both main sequence and red giant stars.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- August 1984
- DOI:
- 10.1086/162292
- Bibcode:
- 1984ApJ...283..192L
- Keywords:
-
- Late Stars;
- Lithium Isotopes;
- Metallicity;
- Red Giant Stars;
- Stellar Composition;
- Abundance;
- Diffusion;
- Fraunhofer Lines;
- Nuclear Fusion;
- Pre-Main Sequence Stars;
- Stellar Envelopes;
- Stellar Evolution;
- Stellar Spectra;
- Astrophysics